To provide cytokine production inhibitors useful aspreventive or therapeutic medicines for diseasesaccompanied by hyperactivated immune functions.A cytokine production inhibitor containing, as anactive ingredient, a thioamide compound represented bythe formula (I) or a salt thereof:(see formula I)wherein A is N, NO, C-NO2 or C-CN； Hal is a halogen； M1is alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl,aryl, heterocyclyl, amino, O, S, SO or SO2； M2 is amino,O, S or a single bond； R1 is a halogen, alkyl or thelike； each of R2, R3, R4 and R5 is independently H, alkylor the like； R6 is a halogen, alkyl or the like； Cy iscycloalkyl, cycloalkenyl, aryl or heterocyclyl； each ofk, p and q is independently an integer of from 0 to 3；and r is an integer of from 0 to 5.
